<template>
    <div class="chartNum">
                <h3 class="orderTitle">订单总量</h3>
                <div class="box-item">
                    <li :class="{'number-item': !isNaN(item), 'mark-item': isNaN(item) }"
                        v-for="(item,index) in orderNum"
                        :key="index">
                            <span v-if="!isNaN(item)">
                              <i ref="numberItem">0123456789</i>
                            </span>
                        <span class="comma" v-else>{{item}}</span>
                    </li>
                </div>
            </div>
</template>
<script>
    export default {
      name:"test",
        data() {
            return {
                orderNum: ['0', '0', ',', '0', '0', '0', ',', '0', '0', '0'], // 默认订单总数
            }
        },
        mounted() {
 
　　　　　　this.$nextTick(() => {
 　　　　　　 this.toOrderNum(1213123) // 这里输入数字即可调用
  　　　　　　this.setNumberTransform()
　　　　　　})
        },
        methods: {
               // 设置文字滚动
            setNumberTransform () {
              const numberItems = this.$refs.numberItem // 拿到数字的ref，计算元素数量
              const numberArr = this.orderNum.filter(item => !isNaN(item))
              // 结合CSS 对数字字符进行滚动,显示订单数量
              for (let index = 0; index < numberItems.length; index++) {
                const elem = numberItems[index]
                elem.style.transform = `translate(-50%, -${numberArr[index] * 10}%)`
              }
            },
            // 处理总订单数字
            toOrderNum(num) {
              num = num.toString()
              // 把订单数变成字符串
              if (num.length < 8) {
                num = '0' + num // 如未满八位数，添加"0"补位
                this.toOrderNum(num) // 递归添加"0"补位
              } else if (num.length === 8) {
                // 订单数中加入逗号
                num = num.slice(0, 2) + ',' + num.slice(2, 5) + ',' + num.slice(5, 8)
                this.orderNum = num.split('') // 将其便变成数据，渲染至滚动数组
              } else {
                // 订单总量数字超过八位显示异常
                this.$message.warning('订单总量数字过大，显示异常，请联系客服')
              }
            },
        }
    }
</script>
<style scoped lang='scss'>
     /*订单总量滚动数字设置*/
    .box-item {
        position: relative;
        height: 100px;
        font-size: 54px;
        line-height: 41px;
        text-align: center;
        list-style: none;
        color: #2D7CFF;
        writing-mode: vertical-lr;
        text-orientation: upright;
        /*文字禁止编辑*/
        -moz-user-select: none; /*火狐*/
        -webkit-user-select: none; /*webkit浏览器*/
        -ms-user-select: none; /*IE10*/
        -khtml-user-select: none; /*早期浏览器*/
        user-select: none;
        /* overflow: hidden; */
    }
    /* 默认逗号设置 */
    .mark-item {
        width: 10px;
        height: 100px;
        margin-right: 5px;
        line-height: 10px;
        font-size: 48px;
        position: relative;
        & > span {
            position: absolute;
            width: 100%;
            bottom: 0;
            writing-mode: vertical-rl;
            text-orientation: upright;
        }
    }
    /*滚动数字设置*/
    .number-item {
        width: 41px;
        height: 75px;
        background: #ccc;
        list-style: none;
        margin-right: 5px;
        background:rgba(250,250,250,1);
        border-radius:4px;
        border:1px solid rgba(221,221,221,1);
        & > span {
            position: relative;
            display: inline-block;
            margin-right: 10px;
            width: 100%;
            height: 100%;
            writing-mode: vertical-rl;
            text-orientation: upright;
            overflow: hidden;
            & > i {
                font-style: normal;
                position: absolute;
                top: 11px;
                left: 50%;
                transform: translate(-50%,0);
                transition: transform 1s ease-in-out;
                letter-spacing: 10px;
            }
        }
    }
    .number-item:last-child {
        margin-right: 0;
    }
</style>